The roots of many forms of American entertainment are linked to a time that lacked diversity in these industries. Hollywood and specifically film is an industry that has been slow to change. There still has never been a person of color or woman that has been the head of a major film studio.
Comics have changed drastically from the humorous and over the top era that popularized them. No longer are they simple books for little kids. Comics have long-standing fan bases that cherish the story and characters alike. Today these publications are more gritty and the heroes often operate in a grey area.